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Visible-Light-Mediated β‑C–H gem-Difluoroallylation of Aldehydes and Cyclic Ketones through C–F Bond Cleavage of 1‑Trifluoromethyl Alkenes

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journal contribution
posted on 05.03.2020, 14:40 by Devireddy Anand, Zhengchang Sun, Lei Zhou
gem-Difluoroalkene bearing a carbonyl group is a challenging target to synthesize by conventional methods. Herein we report a mild and concise route to access the target compounds through the visible-light-mediated direct β-C–H gem-difluoroallylation of aliphatic aldehydes and cyclic ketones. Upon a synergistic combination of photoredox catalysis and organocatalysis, various α-CF3 alkenes were employed as the gem-difluoroallylation reagents via the C–F bond cleavage.